Question: Which mythological Greek character did Hercules kill?
SPARQL (Wikidata):  select distinct ?sbj where { ?sbj wdt:P157 wd:Q122248 . ?sbj wdt:P31 wd:Q22988604 } 
Answer: Nemean lion, Ladon, Orthrus, Hippocoon, Cycnus, Lycus, Linus, Lycaon, Saurus, Tecmessa, Leucaspis, Medebrontes, Emathion, Oreius the centaur, Thurius